Self-sustaining cruise ship communities would primarily be constructed in geographical areas that are level and connected to a water source. Community systems could be constructed in the vast areas now considered less than ideal for profitable development because they are self-sustaining and use water efficiently.
Humanity has space not being used on this planet for human habitation and 7 Billion people mostly compacted into certain geographic areas. Humanity can build ships that can operate in oceans and the vacuum of space, sustainable Community Cruise Ship building would be within humanity's capability as a species.
Community Cruise Ships would exist without borders, when the vast majority of humanity has such a vastly improved quality of life within a community coupled with today’s cultural exposure, national borders will make no sense.
There would be no human disparity and no financial incentive for people to travel to other countries to improve their lives. There would be no more passports to travel between the Community Cruise Ships and Global Zones. Selecting what Community Cruise Ship you live in maybe as simple as selecting the weather your Community Cruise Ship will be exposed too.
There would be no more poverty or disparity in a Community Cruise Ship or significant levels of religion, racism, preventable diseases, crime and countless other current issues to influence your Cruise Ship selection. The only real difference difference between identical Community Cruise Ships would be the weather and temperature as with many actual cruise ships.
Previous national designation or geographic location of a Community Cruise Ship should not influence the quality of life within any community cruise ships as they are constructed of almost identical components as with any fleet of identical cruise ships. An adult universal quality of life would exist in all Community Cruise Ships.